README.md in ndr_import-8.5.0 vs README.md in ndr_import-8.5.1

@@ -50,9 +50,15 @@
 
 See `test/readme_test.rb` for a more complete working example.
 
 More information on the workings of the mapper are available in the [wiki](https://github.com/PublicHealthEngland/ndr_import/wiki).
 
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
 ## Contributing
 
 1. Fork it ( https://github.com/PublicHealthEngland/ndr_import/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)